<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>属性选择器</title>
    <style>
        [type]{
            color: red;
        }

        [type=password]{
            color: blue;
        }
    </style>
</head>
<body>
    用户名：<input type="text"><br/>
    密码：<input type="password"><br/>
    邮箱：<input type="email"><br/>
</body>
</html>